System for exciting iron core in electric device, method for exciting iron core in electric device, program, and modulation operation-setting device for inverter power supply

A system for exciting an iron core in an electric device, the system comprising:

• the electric device having the iron core;
• an inverter power supply configured to output an excitation signal including harmonics to the electric device in order to excite the iron core;
• and
• a modulation operation-setting device configured to set a modulation operation of the inverter power supply,
• wherein the modulation operation-setting device sets the modulation operation of the inverter power supply on the basis of a relationship between areas of closed regions formed by at least one minor loop of a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply and a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with an excitation signal excluding the harmonics, and
• the relationship is adjusted such that an iron loss of the iron core in the case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply is less than an iron loss of the iron core in the case in which the iron core is excited with the excitation signal excluding the harmonics.

A system for exciting an iron core in an electric device, the system comprising:

• the electric device having the iron core;
• an inverter power supply configured to output an excitation signal including harmonics to the electric device in order to excite the iron core;
• and
• a modulation operation-setting device configured to set a modulation operation of the inverter power supply,
• wherein the modulation operation-setting device sets the modulation operation of the inverter power supply on the basis of a relationship between at least one minor loop of a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply and a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with an excitation signal excluding the harmonics, and
• the relationship is adjusted such that, in at least a portion of a region in which the magnetic flux density increases in the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics, in at least one of a plurality of minor loops included in the hysteresis loop in the case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply, an area of a closed region formed by a portion that is located on a side where the field intensity is low with respect to the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics and the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics is larger than an area of a closed region formed by a portion that is located on a side where the field intensity is high with respect to the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics and the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics, and an iron loss of the iron core in the case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply is less than an iron loss of the iron core in the case in which the iron core is excited with the excitation signal excluding the harmonics.

A system for exciting an iron core in an electric device, the system comprising:

• the electric device having the iron core;
• an inverter power supply configured to output an excitation signal including harmonics to the electric device in order to excite the iron core;
• and
• a modulation operation-setting device configured to set a modulation operation of the inverter power supply,
• wherein the modulation operation-setting device sets the modulation operation of the inverter power supply on the basis of a relationship between at least one minor loop of a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply, and a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with an excitation signal excluding the harmonics, and
• the relationship is adjusted such that, in at least a portion of a region in which the magnetic flux density decreases in the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics, in at least one of a plurality of minor loops included in the hysteresis loop in the case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply, an area of a closed region formed by a portion that is located on a side where the field intensity is high with respect to the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics and the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics is larger than an area of a closed region formed by a portion that is located on a side where the field intensity is low with respect to the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics and the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics, and an iron loss of the iron core in the case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply is less than an iron loss of the iron core in the case in which the iron core is excited with the excitation signal excluding the harmonics.

A method for exciting an iron core in an electric device for an inverter power supply configured to output an excitation signal including harmonics to the electric device in order to excite the iron core of the electric device, the method comprising:

• a setting step of setting a modulation operation of the inverter power supply on the basis of a relationship between at least one minor loop of a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply and a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with an excitation signal excluding the harmonics,
• wherein the relationship is adjusted such that, in at least a portion of a region in which the magnetic flux density increases in the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics, in at least one of a plurality of minor loops included in the hysteresis loop in the case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply, an area of a closed region formed by a portion that is located on a side where the field intensity is low with respect to the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics and the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics is larger than an area of a closed region formed by a portion that is located on a side where the field intensity is high with respect to the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics and the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics, and an iron loss of the iron core in the case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply is less than an iron loss of the iron core in the case in which the iron core is excited with the excitation signal excluding the harmonics.

A method for exciting an iron core in an electric device for an inverter power supply configured to output an excitation signal including harmonics to the electric device in order to excite the iron core of the electric device, the method comprising:

• a setting step of setting a modulation operation of the inverter power supply on the basis of a relationship between at least one minor loop of a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply and a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with an excitation signal excluding the harmonics,
• wherein the relationship is adjusted such that, in at least a portion of a region in which the magnetic flux density decreases in the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics, in at least one of a plurality of minor loops included in the hysteresis loop in the case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply, an area of a closed region formed by a portion that is located on a side where the field intensity is high with respect to the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics and the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics is larger than an area of a closed region formed by a portion that is located on a side where the field intensity is low with respect to the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics and the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics, and an iron loss of the iron core in the case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply is less than an iron loss of the iron core in the case in which the iron core is excited with the excitation signal excluding the harmonics.

A modulation operation-setting device for an inverter power supply configured to output an excitation signal including harmonics to an electric device in order to excite an iron core of the electric device,

• wherein the modulation operation-setting device for the inverter power supply sets a modulation operation of the inverter power supply on the basis of a relationship between at least one minor loop of a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply and a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with an excitation signal excluding the harmonics, and
• the relationship is adjusted such that, in at least portion of a region in which the magnetic flux density increases in the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics, in at least one of a plurality of minor loops included in the hysteresis loop in the case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply, a closed region formed by a portion that is located on a side where the field intensity is low with respect to the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics and the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics has a larger area than a closed region formed by a portion that is located on a side where the field intensity is high with respect to the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics and the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics, and an iron loss of the iron core in the case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply is less than an iron loss of the iron core in the case in which the iron core is excited with the excitation signal excluding the harmonics.

A modulation operation-setting device for an inverter power supply configured to output an excitation signal including harmonics to an electric device in order to excite an iron core of the electric device,

• wherein the modulation operation-setting device for the inverter power supply sets a modulation operation of the inverter power supply on the basis of a relationship between at least one minor loop of a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply and a hysteresis loop of a field intensity and a magnetic flux density generated in the iron core in a case in which the iron core is excited with an excitation signal excluding the harmonics, and
• the relationship is adjusted such that, in at least a portion of a region in which the magnetic flux density decreases in the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics, in at least one of a plurality of minor loops included in the hysteresis loop in the case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply, a closed region formed by a portion that is located on a side where the field intensity is high with respect to the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics and the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics has a larger area than a closed region formed by a portion that is located on a side where the field intensity is low with respect to the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics and the hysteresis loop in the case in which the iron core is excited with the excitation signal excluding the harmonics, and an iron loss of the iron core in the case in which the iron core is excited with the excitation signal including the harmonics by the inverter power supply is less than an iron loss of the iron core in the case in which the iron core is excited with the excitation signal excluding the harmonics.